This is only a preview of the December 2012 issue of Silicon Chip. You can view 24 of the 112 pages in the full issue, including the advertisments. For full access, purchase the issue for $10.00 or subscribe for access to the latest issues. Items relevant to "A 2.5GHz 12-digit Frequency Counter, Pt.1":
Items relevant to "USB Power Monitor":
Items relevant to "High-Energy Ignition System For Cars, Pt.2":
Items relevant to "High-Power Class-D Audio Amplifier, Pt.2":
Items relevant to "Modifications For The Induction Motor Speed Controller":
Items relevant to "Hacking A Mini Wireless Web Server, Pt.2":
|
MARKET CENTRE
Cash in your surplus gear. Advertise it here in SILICON CHIP
C O N T R O L S
Tough times
Battery Packs & Chargers
ELNEC IC PROGRAMMERS
High quality
Realistic prices
Free software updates
Large range of adaptors
Windows 95/98/Me/NT/2k/XP
demand innovative solutions!
CLEVERSCOPE
USB OSCILLOSCOPES
Siomar Battery Engineering
www.batterybook.com
Phone (08) 9302 5444
Made in Australia, used by OEMs world-wide
splat-sc.com
2 x 100MSa/s 10bit inputs + trigger
100MHz bandwidth
8 x digital inputs
4M samples/input
Sig-gen + spectrum analyser
Windows 98/Me/NT/2k/XP
IMAGECRAFT C COMPILERS
FOR SALE
questronix.com.au – audiovisual experts solve home, corporate security
and devotional installation & editing
woes. QuestAV CYP, Kramer TVone
(02) 4343 1970 or sales<at>questronix.
com.au
in the magazine. See the SILICON CHIP
PartShop advert in this issue. Phone
(02) 9939 3295 or email silicon<at>
siliconchip.com.au
LEDs! Nichia, Cree and other brand
name LEDs at excellent prices. LED
drivers, including ultra-reliable linear
driver options. Many other interesting
and hard-to-find electronic items!
www.ledsales.com.au
KEITH RIPPON KIT ASSEMBLY &
REPAIR:
* Australia & New Zealand;
* Small production runs.
Phone Keith 0409 662 794.
keith.rippon<at>gmail.com
PCBs MADE, ONE OR MANY. Any
format, hobbyists welcome. Sesame
Electronics Phone (02) 8068 2713.
sesame<at>sesame.com.au
www.sesame.com.au
PCBs & Micros: Silicon Chip Pub
lications can supply PCBs and programmed micros for all recent (and
some not so recent) projects described
KIT ASSEMBLY & REPAIR
WANTED
CUSTOMERS WANTED: Truscotts
Electronic World – large range of semiconductors and passive components for
industry, hobbyist and amateur projects
including Drew Diamond. 27 The Mall,
South Croydon, Melbourne. Phone
(03) 9723 3860. www.electronicworld.
com.au
ADVERTISING IN MARKET CENTRE
Classified Ad Rates: $29.50 (incl. GST) for up to 20 words plus 85 cents for
each additional word. Display ads: $54.50 (incl. GST) per column centimetre
(max. 10cm).
Closing date: 5 weeks prior to month of sale. To book, email the text to silicon<at>
siliconchip.com.au and include your name, address & credit card details, or
fax (02) 9939 2648, or phone (02) 9939 3295.
siliconchip.com.au
ANSI C compilers, Windows IDE
AVR, TMS430, ARM7/ARM9
68HC08, 68HC11, 68HC12
GRANTRONICS PTY LTD
www.grantronics.com.au
Issues Getting
Dog-Eared?
REAL
VALUE
AT
$14.95
PLUS P
&
P
Keep your copies of
SILICON CHIP safe with
these handy binders
Available Aust. only. Price: $A14.95 plus
$10 p&p per order (includes GST). Just
fill in and mail the handy order form in
this issue; or fax (02) 9939 2648; or call
(02) 9939 3295 and quote your credit
card number.
December 2012 111
Advertising Index
Ask SILICON CHIP
. . . continued from p109
and connected in series. However, the
Hearing Loop Receiver is generally
used upright and so there is no need
for an alternative orientation inductor
for pick-up from the horizontal loop.
Using the SoftStarter
in the USA
Can the SoftStarter be used in the
USA with 125VAC mains? (H. E., via
email).
• We are not sure sure whether you
are referring to the SoftStarter for
devices like computers, in the April
2012 issue or the SoftStarter for power
tools, in the July 2012 issue. In both
cases the circuits should work with
125VAC mains but it will be necessary
to double the size of the 330nF supply capacitor, to ensure that the relay
operates properly.
Headphone socket for a
Fender guitar amplifier
I recently purchased a 15W Fender
guitar amplifier and now want to fit a
headphone jack to it. Can I disconnect
the speaker wires completely and fit a
resistor in series with the headphone
wiring and drive the headphones that
way or do I have to use some type of
resistor-capacitor network?
Any suggestions would be much
appreciated. (C. D., via email).
• The first question which must be
asked is “Is it a valve amplifier?” If
so, then you must always have a resistor to substitute for the loudspeaker
resistance.
For example, if the loudspeaker is
15Ω or 16Ω, you can probably get away
112 Silicon Chip
DOWNLOAD OUR CATALOG at
www.iinet.net.au/~worcom
WORLDWIDE ELECTRONIC COMPONENTS
PO Box 631, Hillarys, WA 6923
Ph: (08) 9307 7305 Fax: (08) 9307 7309
Email: worcom<at>iinet.net.au
with a 22Ω 5W wirewound resistor.
Then you need a series resistor to the
headphones to reduce the volume
level. A 1kΩ 1W resistor should be
suitable for 32Ω headphones. The left
and right headphones can be wired in
parallel.
If the amplifier is solid state, then
you can dispense with the need for the
SC
22Ω 5W dummy load resistor.
Notes & Errata
Induction-Motor Speed Controller, May 2012: a number of changes must be made to the original
PCB to ensure reliable operation.
These changes are described on
page 80 of this issue. In addition,
one of the holes is incorrectly
positioned on the heatsink drilling diagram. A corrected drilling
diagram is shown on page 83.
Barking Dog Blaster (September
2012): the 10Ω resistor shown on
the overlay and PCB screen print to
the right of the S2 start switch terminals should be a 100Ω resistor
to match the parts list and circuit.
High-Power Class-D Audio Amplifier (November 2012): the two
3/8-inch x 20mm-long machine
screws listed in the parts list (to
secure the heatsink to the PCB)
should be 3/16-inch x 20mm.
ADM Instrument Engineering......... 5
Altronics.................................. 76-79
Apex Tool Group........................... 17
Circuit Labs Ltd.............................. 9
Cleverscope................................. 89
element14.......................... insert,63
Emona Instruments...................... 65
Gooligum Electronics................... 88
Grantronics................................. 111
Harbuch Electronics................... 107
Hare & Forbes.......................... OBC
HK Wentworth.............................. 21
IMP Printed Circuits..................... 42
Instant PCBs.............................. 111
Jaycar .............................. IFC,53-60
Jimojo........................................... 88
Keith Rippon............................... 111
Kitstop.......................................... 88
LED Sales.................................. 111
Linkwell.......................................... 9
Mastercut..................................... 22
Matrix Multimedia........................... 8
Microchip Technology................... 35
Mikroelektronika......................... IBC
Mektronics.................................... 23
Mouser Electronics......................... 3
Oatley Electronics........................ 89
Ocean Controls.......................... 103
Ozcommfile.................................. 89
Prime Electronics......................... 20
Quest Electronics....................... 111
Radio, TV & Hobbies DVD.......... 109
RF Modules................................ 112
Sesame Electronics................... 111
Silicon Chip Binders............ 102,111
Silicon Chip Bookshop............... 110
Silicon Chip Order Form............. 105
Silicon Chip Partshop................. 104
Silicon Chip Subscriptions........... 87
Siomar Battery Engineering....... 111
Splat Controls............................. 111
Tekmark Australia......................... 88
Telelink......................................... 89
Tenrod Pty Ltd.............................. 43
Trio Smartcal.................................. 4
Truscotts Electronic World.......... 111
Upton Australia............................. 19
Wiltronics..................................... 6,7
Worldwide Elect. Components... 112
siliconchip.com.au
|